Call for more weaponry against ‘neglected malaria’

Archita Bhatta

17/08/15

Speed read

Despite appeal, India does not plan to change its malaria control work

[NEW DELHI] The World Health Organization has called for more research on ways to battle malaria caused by the Plasmodium vivax parasite, in the wake of a surge of infections in Western India.

According to the WHO, the parasite is spreading fast in the Indian cities of Ahmedabad, Bikaner and Mumbai. It still kills fewer people than its relation P. falciparum, but is harder to prevent and treat.

“P. vivax is harder to eliminate than P. falciparum due to its relapsing nature.”

Ramesh Dhiman, India’s National Institute of Malaria Research

Poonam Khetrapal Singh, director of WHO’s South-East Asia Region, said in a statement that more work should be done on combatting vivax malaria, which contributes “a large proportion of global malaria burden”.

On 28 July, the WHO released a report on P. vivax that says more than a third of the world’s population, mostly in Asia and Latin America, remain at risk of the parasite. It says that P. vivax malaria may cause up to 15 per cent of malaria deaths outside Africa.

One complication with this form of malaria is that it can reoccur throughout an infected person’s life, making long-term treatment expensive and eradication difficult.

“P. vivax is harder to eliminate than P. falciparum due to its relapsing nature,” says Ramesh Dhiman, a scientist at India’s National Institute of Malaria Research. Moreover, treatment with the drug primaquine to prevent relapses is hard as patients have to comply with a long-term drug regimen, he says.
To eradicate this form of the disease, scientists face several further challenges, including parasite resistance to drug treatment and the resistance to insecticides of the mosquitoes that transmit the disease, the WHO report says.